Colletotrichum queenslandicum (anthracnose)
Identity
- Preferred Scientific Name
- Colletotrichum queenslandicum Weir & Johnst.
- Preferred Common Name
- anthracnose
- Other Scientific Names
- Colletotrichum gloeosporioides var. minus Simmonds
- International Common Names
- Englishleaf spot, leaf blight
Pictures
Appressoria, conidia and cultures on PDA
Colletotrichum queenslandicum; A, C, E. ICMP 1778 – ex-epitype culture. B, F. ICMP 1780. D, G. ICMP 12564. H. ICMP 18705. A–B. Appressoria. C–D. Conidia. E–H. Cultures on PDA, 10 d growth from single conidia, from above and below. Scale bar A = 20 μm. Scale bar of A applies to A–D. - Image taken from The Colletotrichum gloeosporioides species complex. DOI:10.3114/sim0011
©Bevan Simon Weir, Peter R Johnston and Ulrike Damm/via Studies in Mycology - CC BY-NC-ND 3.0
Distribution
Host Plants and Other Plants Affected
| Host | Host status | References |
|---|---|---|
| Anacardium occidentale (cashew nut) | Main | Veloso et al. (2018) |
| Carica papaya (pawpaw) | Main | Weir et al. (2012) |
| Citrus latifolia (tahiti lime) | Main | Kunta et al. (2018) |
| Coffea (coffee) | Main | Weir et al. (2012) |
| Laguncularia racemosa (white mangrove) | Wild host | Grano-Maldonado et al. (2021) |
| Mangifera indica (mango) | Main | Fuentes-Aragón et al. (2020) |
| Nephelium lappaceum (rambutan) | Main | Serrato-Diaz et al. (2017) |
| Olea europaea | Main | Schena et al. (2014) |
| Passiflora edulis (passionfruit) | Main | James et al. (2014) |
| Persea americana (avocado) | Main | Weir et al. (2012) |
| Syzygium australe | Main | Liu et al. (2016) |
Symptoms
Colletotrichum queenslandicum can cause anthracnose on leaves and fruits, and symptoms do not differ from anthracnose caused by other Colletotrichum species. Anthracnose on leaves is represented by irregular or rounded necrotic lesions, which may expand and cause foliar distortion. On fruits, necrotic lesions are mostly rounded with the centre depressed; the symptoms progress and it is possible to see acervuli and orange conidial masses on the lesions.
Infection is quiescent like most Colletotrichum species: the fungus penetrates the leaves and unripe fruits and starts an asymptomatic colonization (biotrophic phase); symptoms only appear when environmental conditions are favourable and/or the fruits are ripe (necrotrophic phase) (Jayawardena et al., 2021).
Anthracnose can occur in several climates. However, most reports are from tropical and subtropical regions, where the high temperature and high air humidity are favourable for the pathogen. Disease progression is faster under these conditions, and the highest incidences and severities are observed during the rainy period (Agrios, 2005).
List of Symptoms/Signs
| Symptom or sign | Life stages | Sign or diagnosis |
|---|---|---|
| Plants/Fruit/lesions: black or brown | ||
| Plants/Inflorescence/lesions; flecking; streaks (not Poaceae) | ||
| Plants/Leaves/abnormal patterns | ||
| Plants/Leaves/necrotic areas |
Prevention and Control
Control
Information about the management of C. queenslandicum is scarce. Although chemical control is the method most often used to prevent or control anthracnose, there are no in vivo studies evaluating the most effective fungicide for control of C. queenslandicum.
On the basis of in vitro studies carried out by Fuentes-Aragón et al. (2020) and Veloso et al. (2021), thiophanate-methyl was shown to significantly inhibit mycelial growth of C. queenslandicum. However, it is necessary to investigate whether this fungicide remains effective in the field.
Veloso et al. (2021) also observed that the mycelial growth rate for C. queenslandicum is significantly reduced by low temperatures in vitro, indicating that fruit storage under refrigeration may delay anthracnose development.
Information & Authors
Information
Published In
Copyright
Copyright © CABI. CABI is a registered EU trademark. This article is published under a Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0)
History
Published online: 28 March 2023
Language
English
Authors
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